Patent FR1386811A successfully refreshed from Google Patents.
US2919170A
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Means for electrostatically recording signals
Assignee: Unisys Corp
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Filing: 1952-11-14
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Granted: 1959-12-29
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Expires: 1972-11-14
Abstract
No abstract record available.
Inventors
- 👤 Epstein Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:29
CPC Classifications
H; H04; H04L; H04L13/00; H04L13/02; H04L13/08; G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; G06; G06K; G06K15/00; G06K15/02; G06K15/14; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |